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<FONT color="green">001</FONT>    /*<a name="line.1"></a>
<FONT color="green">002</FONT>     * Licensed to the Apache Software Foundation (ASF) under one or more<a name="line.2"></a>
<FONT color="green">003</FONT>     * contributor license agreements.  See the NOTICE file distributed with<a name="line.3"></a>
<FONT color="green">004</FONT>     * this work for additional information regarding copyright ownership.<a name="line.4"></a>
<FONT color="green">005</FONT>     * The ASF licenses this file to You under the Apache License, Version 2.0<a name="line.5"></a>
<FONT color="green">006</FONT>     * (the "License"); you may not use this file except in compliance with<a name="line.6"></a>
<FONT color="green">007</FONT>     * the License.  You may obtain a copy of the License at<a name="line.7"></a>
<FONT color="green">008</FONT>     *<a name="line.8"></a>
<FONT color="green">009</FONT>     *     http://www.apache.org/licenses/LICENSE-2.0<a name="line.9"></a>
<FONT color="green">010</FONT>     *<a name="line.10"></a>
<FONT color="green">011</FONT>     * Unless required by applicable law or agreed to in writing, software<a name="line.11"></a>
<FONT color="green">012</FONT>     * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.12"></a>
<FONT color="green">013</FONT>     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.13"></a>
<FONT color="green">014</FONT>     * See the License for the specific language governing permissions and<a name="line.14"></a>
<FONT color="green">015</FONT>     * limitations under the License.<a name="line.15"></a>
<FONT color="green">016</FONT>     */<a name="line.16"></a>
<FONT color="green">017</FONT>    package org.apache.commons.jxpath.ri.model.beans;<a name="line.17"></a>
<FONT color="green">018</FONT>    <a name="line.18"></a>
<FONT color="green">019</FONT>    import org.apache.commons.jxpath.AbstractFactory;<a name="line.19"></a>
<FONT color="green">020</FONT>    import org.apache.commons.jxpath.JXPathAbstractFactoryException;<a name="line.20"></a>
<FONT color="green">021</FONT>    import org.apache.commons.jxpath.JXPathContext;<a name="line.21"></a>
<FONT color="green">022</FONT>    import org.apache.commons.jxpath.JXPathInvalidAccessException;<a name="line.22"></a>
<FONT color="green">023</FONT>    import org.apache.commons.jxpath.ri.QName;<a name="line.23"></a>
<FONT color="green">024</FONT>    import org.apache.commons.jxpath.ri.model.NodePointer;<a name="line.24"></a>
<FONT color="green">025</FONT>    <a name="line.25"></a>
<FONT color="green">026</FONT>    /**<a name="line.26"></a>
<FONT color="green">027</FONT>     * @author Dmitri Plotnikov<a name="line.27"></a>
<FONT color="green">028</FONT>     * @version $Revision: 652884 $ $Date: 2008-05-02 15:02:00 -0500 (Fri, 02 May 2008) $<a name="line.28"></a>
<FONT color="green">029</FONT>     */<a name="line.29"></a>
<FONT color="green">030</FONT>    public class NullPropertyPointer extends PropertyPointer {<a name="line.30"></a>
<FONT color="green">031</FONT>    <a name="line.31"></a>
<FONT color="green">032</FONT>        private String propertyName = "*";<a name="line.32"></a>
<FONT color="green">033</FONT>        private boolean byNameAttribute = false;<a name="line.33"></a>
<FONT color="green">034</FONT>    <a name="line.34"></a>
<FONT color="green">035</FONT>        private static final long serialVersionUID = 5296593071854982754L;<a name="line.35"></a>
<FONT color="green">036</FONT>    <a name="line.36"></a>
<FONT color="green">037</FONT>        /**<a name="line.37"></a>
<FONT color="green">038</FONT>         * Create a new NullPropertyPointer.<a name="line.38"></a>
<FONT color="green">039</FONT>         * @param parent pointer<a name="line.39"></a>
<FONT color="green">040</FONT>         */<a name="line.40"></a>
<FONT color="green">041</FONT>        public NullPropertyPointer(NodePointer parent) {<a name="line.41"></a>
<FONT color="green">042</FONT>            super(parent);<a name="line.42"></a>
<FONT color="green">043</FONT>        }<a name="line.43"></a>
<FONT color="green">044</FONT>    <a name="line.44"></a>
<FONT color="green">045</FONT>        public QName getName() {<a name="line.45"></a>
<FONT color="green">046</FONT>            return new QName(propertyName);<a name="line.46"></a>
<FONT color="green">047</FONT>        }<a name="line.47"></a>
<FONT color="green">048</FONT>    <a name="line.48"></a>
<FONT color="green">049</FONT>        public void setPropertyIndex(int index) {<a name="line.49"></a>
<FONT color="green">050</FONT>        }<a name="line.50"></a>
<FONT color="green">051</FONT>    <a name="line.51"></a>
<FONT color="green">052</FONT>        public int getLength() {<a name="line.52"></a>
<FONT color="green">053</FONT>            return 0;<a name="line.53"></a>
<FONT color="green">054</FONT>        }<a name="line.54"></a>
<FONT color="green">055</FONT>    <a name="line.55"></a>
<FONT color="green">056</FONT>        public Object getBaseValue() {<a name="line.56"></a>
<FONT color="green">057</FONT>            return null;<a name="line.57"></a>
<FONT color="green">058</FONT>        }<a name="line.58"></a>
<FONT color="green">059</FONT>    <a name="line.59"></a>
<FONT color="green">060</FONT>        public Object getImmediateNode() {<a name="line.60"></a>
<FONT color="green">061</FONT>            return null;<a name="line.61"></a>
<FONT color="green">062</FONT>        }<a name="line.62"></a>
<FONT color="green">063</FONT>    <a name="line.63"></a>
<FONT color="green">064</FONT>        public boolean isLeaf() {<a name="line.64"></a>
<FONT color="green">065</FONT>            return true;<a name="line.65"></a>
<FONT color="green">066</FONT>        }<a name="line.66"></a>
<FONT color="green">067</FONT>    <a name="line.67"></a>
<FONT color="green">068</FONT>        public NodePointer getValuePointer() {<a name="line.68"></a>
<FONT color="green">069</FONT>            return new NullPointer(this,  new QName(getPropertyName()));<a name="line.69"></a>
<FONT color="green">070</FONT>        }<a name="line.70"></a>
<FONT color="green">071</FONT>    <a name="line.71"></a>
<FONT color="green">072</FONT>        protected boolean isActualProperty() {<a name="line.72"></a>
<FONT color="green">073</FONT>            return false;<a name="line.73"></a>
<FONT color="green">074</FONT>        }<a name="line.74"></a>
<FONT color="green">075</FONT>    <a name="line.75"></a>
<FONT color="green">076</FONT>        public boolean isActual() {<a name="line.76"></a>
<FONT color="green">077</FONT>            return false;<a name="line.77"></a>
<FONT color="green">078</FONT>        }<a name="line.78"></a>
<FONT color="green">079</FONT>    <a name="line.79"></a>
<FONT color="green">080</FONT>        public boolean isContainer() {<a name="line.80"></a>
<FONT color="green">081</FONT>            return true;<a name="line.81"></a>
<FONT color="green">082</FONT>        }<a name="line.82"></a>
<FONT color="green">083</FONT>    <a name="line.83"></a>
<FONT color="green">084</FONT>        public void setValue(Object value) {<a name="line.84"></a>
<FONT color="green">085</FONT>            if (parent == null || parent.isContainer()) {<a name="line.85"></a>
<FONT color="green">086</FONT>                throw new JXPathInvalidAccessException(<a name="line.86"></a>
<FONT color="green">087</FONT>                    "Cannot set property "<a name="line.87"></a>
<FONT color="green">088</FONT>                        + asPath()<a name="line.88"></a>
<FONT color="green">089</FONT>                        + ", the target object is null");<a name="line.89"></a>
<FONT color="green">090</FONT>            }<a name="line.90"></a>
<FONT color="green">091</FONT>            if (parent instanceof PropertyOwnerPointer<a name="line.91"></a>
<FONT color="green">092</FONT>                    &amp;&amp; ((PropertyOwnerPointer) parent)<a name="line.92"></a>
<FONT color="green">093</FONT>                            .isDynamicPropertyDeclarationSupported()) {<a name="line.93"></a>
<FONT color="green">094</FONT>                // If the parent property owner can create<a name="line.94"></a>
<FONT color="green">095</FONT>                // a property automatically - let it do so<a name="line.95"></a>
<FONT color="green">096</FONT>                PropertyPointer propertyPointer =<a name="line.96"></a>
<FONT color="green">097</FONT>                    ((PropertyOwnerPointer) parent).getPropertyPointer();<a name="line.97"></a>
<FONT color="green">098</FONT>                propertyPointer.setPropertyName(propertyName);<a name="line.98"></a>
<FONT color="green">099</FONT>                propertyPointer.setValue(value);<a name="line.99"></a>
<FONT color="green">100</FONT>            }<a name="line.100"></a>
<FONT color="green">101</FONT>            else {<a name="line.101"></a>
<FONT color="green">102</FONT>                throw new JXPathInvalidAccessException(<a name="line.102"></a>
<FONT color="green">103</FONT>                    "Cannot set property "<a name="line.103"></a>
<FONT color="green">104</FONT>                        + asPath()<a name="line.104"></a>
<FONT color="green">105</FONT>                        + ", path does not match a changeable location");<a name="line.105"></a>
<FONT color="green">106</FONT>            }<a name="line.106"></a>
<FONT color="green">107</FONT>        }<a name="line.107"></a>
<FONT color="green">108</FONT>    <a name="line.108"></a>
<FONT color="green">109</FONT>        public NodePointer createPath(JXPathContext context) {<a name="line.109"></a>
<FONT color="green">110</FONT>            NodePointer newParent = parent.createPath(context);<a name="line.110"></a>
<FONT color="green">111</FONT>            if (isAttribute()) {<a name="line.111"></a>
<FONT color="green">112</FONT>                return newParent.createAttribute(context, getName());<a name="line.112"></a>
<FONT color="green">113</FONT>            }<a name="line.113"></a>
<FONT color="green">114</FONT>            if (parent instanceof NullPointer &amp;&amp; parent.equals(newParent)) {<a name="line.114"></a>
<FONT color="green">115</FONT>                throw createBadFactoryException(context.getFactory());<a name="line.115"></a>
<FONT color="green">116</FONT>            }<a name="line.116"></a>
<FONT color="green">117</FONT>            // Consider these two use cases:<a name="line.117"></a>
<FONT color="green">118</FONT>            // 1. The parent pointer of NullPropertyPointer is<a name="line.118"></a>
<FONT color="green">119</FONT>            //    a PropertyOwnerPointer other than NullPointer. When we call<a name="line.119"></a>
<FONT color="green">120</FONT>            //    createPath on it, it most likely returns itself. We then<a name="line.120"></a>
<FONT color="green">121</FONT>            //    take a PropertyPointer from it and get the PropertyPointer<a name="line.121"></a>
<FONT color="green">122</FONT>            //    to expand the collection for the corresponding property.<a name="line.122"></a>
<FONT color="green">123</FONT>            //<a name="line.123"></a>
<FONT color="green">124</FONT>            // 2. The parent pointer of NullPropertyPointer is a NullPointer.<a name="line.124"></a>
<FONT color="green">125</FONT>            //    When we call createPath, it may return a PropertyOwnerPointer<a name="line.125"></a>
<FONT color="green">126</FONT>            //    or it may return anything else, like a DOMNodePointer.<a name="line.126"></a>
<FONT color="green">127</FONT>            //    In the former case we need to do exactly what we did in use<a name="line.127"></a>
<FONT color="green">128</FONT>            //    case 1.  In the latter case, we simply request that the<a name="line.128"></a>
<FONT color="green">129</FONT>            //    non-property pointer expand the collection by itself.<a name="line.129"></a>
<FONT color="green">130</FONT>            if (newParent instanceof PropertyOwnerPointer) {<a name="line.130"></a>
<FONT color="green">131</FONT>                PropertyOwnerPointer pop = (PropertyOwnerPointer) newParent;<a name="line.131"></a>
<FONT color="green">132</FONT>                newParent = pop.getPropertyPointer();<a name="line.132"></a>
<FONT color="green">133</FONT>            }<a name="line.133"></a>
<FONT color="green">134</FONT>            return newParent.createChild(context, getName(), getIndex());<a name="line.134"></a>
<FONT color="green">135</FONT>        }<a name="line.135"></a>
<FONT color="green">136</FONT>    <a name="line.136"></a>
<FONT color="green">137</FONT>        public NodePointer createPath(JXPathContext context, Object value) {<a name="line.137"></a>
<FONT color="green">138</FONT>            NodePointer newParent = parent.createPath(context);<a name="line.138"></a>
<FONT color="green">139</FONT>            if (isAttribute()) {<a name="line.139"></a>
<FONT color="green">140</FONT>                NodePointer pointer = newParent.createAttribute(context, getName());<a name="line.140"></a>
<FONT color="green">141</FONT>                pointer.setValue(value);<a name="line.141"></a>
<FONT color="green">142</FONT>                return pointer;<a name="line.142"></a>
<FONT color="green">143</FONT>            }<a name="line.143"></a>
<FONT color="green">144</FONT>            if (parent instanceof NullPointer &amp;&amp; parent.equals(newParent)) {<a name="line.144"></a>
<FONT color="green">145</FONT>                throw createBadFactoryException(context.getFactory());<a name="line.145"></a>
<FONT color="green">146</FONT>            }<a name="line.146"></a>
<FONT color="green">147</FONT>            if (newParent instanceof PropertyOwnerPointer) {<a name="line.147"></a>
<FONT color="green">148</FONT>                PropertyOwnerPointer pop = (PropertyOwnerPointer) newParent;<a name="line.148"></a>
<FONT color="green">149</FONT>                newParent = pop.getPropertyPointer();<a name="line.149"></a>
<FONT color="green">150</FONT>            }<a name="line.150"></a>
<FONT color="green">151</FONT>            return newParent.createChild(context, getName(), index, value);<a name="line.151"></a>
<FONT color="green">152</FONT>        }<a name="line.152"></a>
<FONT color="green">153</FONT>    <a name="line.153"></a>
<FONT color="green">154</FONT>        public NodePointer createChild(JXPathContext context, QName name, int index) {<a name="line.154"></a>
<FONT color="green">155</FONT>            return createPath(context).createChild(context, name, index);<a name="line.155"></a>
<FONT color="green">156</FONT>        }<a name="line.156"></a>
<FONT color="green">157</FONT>    <a name="line.157"></a>
<FONT color="green">158</FONT>        public NodePointer createChild(JXPathContext context, QName name,<a name="line.158"></a>
<FONT color="green">159</FONT>                int index, Object value) {<a name="line.159"></a>
<FONT color="green">160</FONT>            return createPath(context).createChild(context, name, index, value);<a name="line.160"></a>
<FONT color="green">161</FONT>        }<a name="line.161"></a>
<FONT color="green">162</FONT>    <a name="line.162"></a>
<FONT color="green">163</FONT>        public String getPropertyName() {<a name="line.163"></a>
<FONT color="green">164</FONT>            return propertyName;<a name="line.164"></a>
<FONT color="green">165</FONT>        }<a name="line.165"></a>
<FONT color="green">166</FONT>    <a name="line.166"></a>
<FONT color="green">167</FONT>        public void setPropertyName(String propertyName) {<a name="line.167"></a>
<FONT color="green">168</FONT>            this.propertyName = propertyName;<a name="line.168"></a>
<FONT color="green">169</FONT>        }<a name="line.169"></a>
<FONT color="green">170</FONT>    <a name="line.170"></a>
<FONT color="green">171</FONT>        /**<a name="line.171"></a>
<FONT color="green">172</FONT>         * Set the name attribute.<a name="line.172"></a>
<FONT color="green">173</FONT>         * @param attributeValue value to set<a name="line.173"></a>
<FONT color="green">174</FONT>         */<a name="line.174"></a>
<FONT color="green">175</FONT>        public void setNameAttributeValue(String attributeValue) {<a name="line.175"></a>
<FONT color="green">176</FONT>            this.propertyName = attributeValue;<a name="line.176"></a>
<FONT color="green">177</FONT>            byNameAttribute = true;<a name="line.177"></a>
<FONT color="green">178</FONT>        }<a name="line.178"></a>
<FONT color="green">179</FONT>    <a name="line.179"></a>
<FONT color="green">180</FONT>        public boolean isCollection() {<a name="line.180"></a>
<FONT color="green">181</FONT>            return getIndex() != WHOLE_COLLECTION;<a name="line.181"></a>
<FONT color="green">182</FONT>        }<a name="line.182"></a>
<FONT color="green">183</FONT>    <a name="line.183"></a>
<FONT color="green">184</FONT>        public int getPropertyCount() {<a name="line.184"></a>
<FONT color="green">185</FONT>            return 0;<a name="line.185"></a>
<FONT color="green">186</FONT>        }<a name="line.186"></a>
<FONT color="green">187</FONT>    <a name="line.187"></a>
<FONT color="green">188</FONT>        public String[] getPropertyNames() {<a name="line.188"></a>
<FONT color="green">189</FONT>            return new String[0];<a name="line.189"></a>
<FONT color="green">190</FONT>        }<a name="line.190"></a>
<FONT color="green">191</FONT>    <a name="line.191"></a>
<FONT color="green">192</FONT>        public String asPath() {<a name="line.192"></a>
<FONT color="green">193</FONT>            if (!byNameAttribute) {<a name="line.193"></a>
<FONT color="green">194</FONT>                return super.asPath();<a name="line.194"></a>
<FONT color="green">195</FONT>            }<a name="line.195"></a>
<FONT color="green">196</FONT>            StringBuffer buffer = new StringBuffer();<a name="line.196"></a>
<FONT color="green">197</FONT>            buffer.append(getImmediateParentPointer().asPath());<a name="line.197"></a>
<FONT color="green">198</FONT>            buffer.append("[@name='");<a name="line.198"></a>
<FONT color="green">199</FONT>            buffer.append(escape(getPropertyName()));<a name="line.199"></a>
<FONT color="green">200</FONT>            buffer.append("']");<a name="line.200"></a>
<FONT color="green">201</FONT>            if (index != WHOLE_COLLECTION) {<a name="line.201"></a>
<FONT color="green">202</FONT>                buffer.append('[').append(index + 1).append(']');<a name="line.202"></a>
<FONT color="green">203</FONT>            }<a name="line.203"></a>
<FONT color="green">204</FONT>            return buffer.toString();<a name="line.204"></a>
<FONT color="green">205</FONT>        }<a name="line.205"></a>
<FONT color="green">206</FONT>    <a name="line.206"></a>
<FONT color="green">207</FONT>        /**<a name="line.207"></a>
<FONT color="green">208</FONT>         * Create a "bad factory" JXPathAbstractFactoryException for the specified AbstractFactory.<a name="line.208"></a>
<FONT color="green">209</FONT>         * @param factory AbstractFactory<a name="line.209"></a>
<FONT color="green">210</FONT>         * @return JXPathAbstractFactoryException<a name="line.210"></a>
<FONT color="green">211</FONT>         */<a name="line.211"></a>
<FONT color="green">212</FONT>        private JXPathAbstractFactoryException createBadFactoryException(AbstractFactory factory) {<a name="line.212"></a>
<FONT color="green">213</FONT>            return new JXPathAbstractFactoryException("Factory " + factory<a name="line.213"></a>
<FONT color="green">214</FONT>                    + " reported success creating object for path: " + asPath()<a name="line.214"></a>
<FONT color="green">215</FONT>                    + " but object was null.  Terminating to avoid stack recursion.");<a name="line.215"></a>
<FONT color="green">216</FONT>        }<a name="line.216"></a>
<FONT color="green">217</FONT>    }<a name="line.217"></a>




























































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